Title of Invention

PROCESS OF WELDING OF SHEETS AND OTHER ELEMENTS

Abstract

A process of joining two elements to each other by welding comprising the steps of creating profiles at the end edges of the elements to be welded; providing a spacer element having length at least equal to the length of the edges of the joint of the two elements to be welded; recesses for receiving the edges of the elements to be welded and a nose formation extending throughout the length of the spacer element; spacing apart the said two elements to welded at the edges by locating the nose formation between the edges and aligning the edges of the two elements in the recesses of the spacer element; and welding the said two elements to be welded by a conventional welding process at the edges of the said elements above the nose formation of the spacer element.

Full Text

FORM - 2 THE PATENTS ACT, 1970 (39 of 1970) & THE PATENTS RULES, 2003 COMPLETE Specification (See section 10 and rule 13) PROCESS OF WELDING OF SHEETS AND OTHER ELEMENTS KIRLOSKAR COPELAND LTD. An Indian Company of 1202/1, Ghole Road, Pune 411 005, Maharashtra, India ORIGINAL 453-MUM-2004 THE FOLLOWING SPECIFICATION PARTICULARLY DESCRIBES THE INVENTION AND THE MANNER IN WHICH IT IS TO BE PERFORMED:- This invention relates to the process of welding of sheets & other elements. In particular, this invention relates to the welding of objects such as housings or covers to each other by spot welding, butt-welding or seam welding. Still particularly, this invention relates to a process of welding the shells of a compressor body to each other. In the prior art, welding of two elements is achieved by first profiling the edges of the two elements at the joint to be welded so that one element overlaps the other. This overlapping is necessary to maintain the two elements at a proper distance with respect to each other & accurately form a location between the two elements so that the weld can take place accurately & aesthetically. The position of two elements A and B and the position of the weld W in the prior art is seen in Fig.l of the accompanying drawings. The shoulder S formed in the element A is the profiling step which permits the location of the end E of element B to be located therein and this contouring of the two portions i.e. is the shoulder S and the end E requires several steps of machining. According to this invention there is provided a process of joining two elements to each other by welding comprising the steps of creating profiles at the end edges of the elements to be welded; providing a spacer element having length at least equal to the length of the edges of the joint of the two elements to be welded; recesses for receiving the 2 edges of the elements to be welded and a nose formation extending throughout the length of the spacer element; spacing apart the said two elements to welded at the edges by locating the nose formation, between the edges and aligning the edges of the two elements in the recesses of the spacer element; and welding the said two elements to be welded by a conventional welding process at the edges of the said elements above the nose formation of the spacer element. • The profiles created at the edges of the two elements to be welded are straight linear profiles or are not straight and non linear profiles. The present invention envisages a process as seen in Fig.2 of the accompanying drawings. As seen in Fig.2 the two elements C and D, which are to be welded, have straight profiles at the ends. The elements C and D are separated by a spacer element T and the weld W is seen formed at the ends. The spacer element T is shaped in such a manner that it has a nose formation N, which can be, located between the two elements C and D and recesses R in which the edges of the two elements C and D can be seated. The spacer element T serves the functions of aligning the two elements C and D, maintaining the desired space between the two elements and also preventing the welding debris from falling below the elements C and D during the welding process. Welding processes to which this art can apply includes but is not limited to arc welding, spot welding, tungsten-inert gas welding, or magnesium steel inert gas welding. 3 The profiles of the edges of the elements to be welded can be straight, curved, wavy, zig zag, or any other regular or irregular shape. The nose and the recess formations of the spacer element T is so formed as to contour the respective edges of the two elements to be welded. It is envisaged the method in accordance with the present invention will save the steps of forming shoulders and profiles. Technical Advance and significant economic advantage : Hydrostatic bursting strength = 100 kg / cm2 equal for old art and new art. Fatigue strength of the joint -equal for old art and new art. Blank size reduction by 10% in new art compared to old art i.e., saving of material cost by 10%. Reduction of process step of collar forming in old art. This is achieved without reducing the strength of the welded joint Protection from entry of debris/spatters which fall inside the fabrication component. 4 We Claim: [1] A process of joining two elements to each other by welding comprising the steps of creating profiles at the end edges of the elements to be welded; providing a spacer element having length at least equal to the length of the edges of the joint of the two elements to be welded; recesses for receiving the edges of the elements to be welded and a nose formation extending throughout the length of the spacer element; spacing apart the said two elements to welded at the edges by locating the nose formation between the edges and aligning the edges of the two elements in the recesses of the spacer element; and welding the said two elements to be welded by a conventional welding process at the edges of the said elements above the nose formation of the spacer element. [2] A process of joining two elements to each other by welding as claimed in claim 1, in which the profiles created at the edges of the two elements to be welded are straight linear profiles. [3] A process of joining two elements to each other by welding as claimed in claim 1, in which the profiles created at the edges of the two elements to be welded are no straight and no linear profiles. 5 [4] A process of joining two elements to each other by welding as described herein with reference to the accompanying drawings. Dated this 7th day of April 2005 Mohan Dewan of R K Dewan & Co Applicants' Patent Attorney 6

Documents:

453-mum-2004-cancelled pages(8-11-2005).pdf

453-mum-2004-claims(granted)-(8-4-2005).doc

453-mum-2004-claims(granted)-(8-4-2005).pdf

453-mum-2004-correspondece(22-1-2007).pdf

453-mum-2004-correspondece(ipo)-(24-7-2007).pdf

453-mum-2004-form 1(15-4-2004).pdf

453-mum-2004-form 13(22-1-2007).pdf

453-mum-2004-form 18(29-8-2005).pdf

453-mum-2004-form 2(granted)-(8-4-2005).doc

453-mum-2004-form 2(granted)-(8-4-2005).pdf

453-mum-2004-form 26(20-1-2006).pdf

453-mum-2004-form 26(22-1-2007).pdf

453-mum-2004-form 3(15-4-2004).pdf

453-mum-2004-form 5(8-8-2005).pdf

453-mum-2004-form 9(20-5-2005).pdf

453-mum-2004-general power of authority(16-8-2004).pdf

453-mum-2004-power of attorney(15-4-2004).pdf